CVE-2019-1478 — Windows COM Server Elevation of Privilege Vulnerability

Executive Summary

An elevation of privilege vulnerability exists when Windows improperly handles COM object creation. An attacker who successfully exploited the vulnerability could run arbitrary code with elevated privileges. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses the vulnerability by correcting how the Windows COM Server creates COM objects.

Overview

7.8

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

N/A

MS Exploit Likelihood

Category Elevation of Privilege

Released Dec 10 2019

Last Updated Dec 10 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00827 — 0.52656 percentile

CVSS Vector

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

Temporal Score: 7.0

EPSS Score

0.00827

probability of exploitation in the next 30 days

0.52656 percentile - updated 2026-06-20

View on FIRST.org

Affected Products

10 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 7 for 32-bit Systems Service Pack 1	`4530734 (Monthly Rollup) 4530692 (Security Only)`	Important	Elevation of Privilege	Yes
Windows 7 for x64-based Systems Service Pack 1	`4530734 (Monthly Rollup) 4530692 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2	`4530695 (Monthly Rollup) 4530719 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)	`4530695 (Monthly Rollup) 4530719 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 for Itanium-Based Systems Service Pack 2	`4530695 (Monthly Rollup) 4530719 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 for x64-based Systems Service Pack 2	`4530695 (Monthly Rollup) 4530719 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	`4530695 (Monthly Rollup) 4530719 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1	`4530734 (Monthly Rollup) 4530692 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1	`4530734 (Monthly Rollup) 4530692 (Security Only)`	Important	Elevation of Privilege	Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	`4530734 (Monthly Rollup) 4530692 (Security Only)`	Important	Elevation of Privilege	Yes

Patches

2 patches

Article	Type	Restart
`4530734 (Monthly Rollup) 4530692`	Monthly Rollup	Yes
`4530695 (Monthly Rollup) 4530719`	Monthly Rollup	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Diffense

References

MSRC Advisory MITRE NVD